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<p>Surpassing polymeric materials in temperature stability, dielectric ceramics are ideal for high-power electronics. However, enhancing their energy storage density remains challenging. Ba<sub>0.4</sub>Sr<sub>0.6</sub>TiO<sub>3</sub> exhibits low dielectric loss and high efficiency but suffers from intrinsically low polarization, limiting its energy storage density. To address this, we introduce&#xa0;NaNbO<sub>3</sub>&#xa0;into Ba<sub>0.4</sub>Sr<sub>0.6</sub>TiO<sub>3</sub> to enhance its energy storage capabilities. The 0.8Ba<sub>0.4</sub>Sr<sub>0.6</sub>TiO<sub>3</sub>-0.2NaNbO<sub>3</sub> achieves a&#xa0;record recoverable energy density (<i>W</i><sub>rec</sub>) of 5.36&#xa0;J/cm<sup>3</sup>&#xa0;with&#xa0;84.4% efficiency (<i>η</i>)&#xa0;under 390&#xa0;kV/cm breakdown strength. This work demonstrates that doping Ba<sub>0.4</sub>Sr<sub>0.6</sub>TiO<sub>3</sub> with&#xa0;high-polarization ferroelectrics such as NaNbO<sub>3</sub> can significantly enhance its energy storage performance.</p>

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Enhanced Energy Storage Performance of Ba0.4Sr0.6TiO3 Ceramic by Incorporating High Polarization NaNbO3

  • 期刊论文

  • 发表日期：

    2025年11月7日

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  • Lisong Li,
  • Dongchuan Wei,
  • Fei Xue,
  • Yahui Tian,
  • Lan Qiu

摘要

Surpassing polymeric materials in temperature stability, dielectric ceramics are ideal for high-power electronics. However, enhancing their energy storage density remains challenging. Ba0.4Sr0.6TiO3 exhibits low dielectric loss and high efficiency but suffers from intrinsically low polarization, limiting its energy storage density. To address this, we introduce NaNbO3 into Ba0.4Sr0.6TiO3 to enhance its energy storage capabilities. The 0.8Ba0.4Sr0.6TiO3-0.2NaNbO3 achieves a record recoverable energy density (Wrec) of 5.36 J/cm3 with 84.4% efficiency (η) under 390 kV/cm breakdown strength. This work demonstrates that doping Ba0.4Sr0.6TiO3 with high-polarization ferroelectrics such as NaNbO3 can significantly enhance its energy storage performance.